Mohammad Mursaleen is presently a Principal Investigator for a SERB Core Research Grant at Department of Mathematics, Aligarh Muslim University. He has published more than 330 research papers in the field of Summability, Sequence Spaces, Approximation Theory, Fixed Point Theory, Measures of Noncompactness. He has also published 8 books and completed several National and International projects, visited several countries. Besides several master's students he has guided 20 Ph.D. students, and served as a reviewer for various international scientific journals. He is also a member of editorial boards of many international scientific journals.Feyzi Başar is a Professor Emeritus since July 2016, at ˙In¨on¨u University,Turkey. He has published an e-book for graduate students and researchers and more than 150 scientific papers in the field of summability theory, sequence spaces, FK-spaces, Schauder bases, dual spaces, matrix transformations, spectrum of certain linear operators represented by a triangle matrix over some sequence space, the alpha-, beta- and gamma-duals and some topological properties of the domains of some double and four dimensional triangles in the certain spaces of single and double sequences, sets of the sequences of fuzzy numbers, multiplicative calculus. He has guided 17 master and 10 Ph.D. students., served as a referee for 121 international scientific journals. He is the member of editorial board of 21 scientific journals. Feyzi Başar is also a member of scientific committee of 17 mathematics conference, has given talks at 14 different universities as an invited speaker and participated in more than 70 mathematics symposium with a paper.

• 1. Basic Functional Analysis. 2. Geometric Properties of Some Sequence Spaces. 3. Infinite Matrices. 4. Difference Sequence Spaces. 5. Almost Convergence and Classes of Related Matrix Transformations. 6. Spectrum of Some Triangle Matrices on Some Sequence Spaces. 7. Sets of Fuzzy Valued Sequences and Series.

Mohammad Mursaleen is presently a Principal Investigator for a SERB Core Research Grant at Department of Mathematics, Aligarh Muslim University. He has published more than 330 research papers in the field of Summability, Sequence Spaces, Approximation Theory, Fixed Point Theory, Measures of Noncompactness. He has also published 8 books and completed several National and International projects, visited several countries. Besides several master's students he has guided 20 Ph.D. students, and served as a reviewer for various international scientific journals. He is also a member of editorial boards of many international scientific journals.Feyzi Başar is a Professor Emeritus since July 2016, at ˙In¨on¨u University,Turkey. He has published an e-book for graduate students and researchers and more than 150 scientific papers in the field of summability theory, sequence spaces, FK-spaces, Schauder bases, dual spaces, matrix transformations, spectrum of certain linear operators represented by a triangle matrix over some sequence space, the alpha-, beta- and gamma-duals and some topological properties of the domains of some double and four dimensional triangles in the certain spaces of single and double sequences, sets of the sequences of fuzzy numbers, multiplicative calculus. He has guided 17 master and 10 Ph.D. students., served as a referee for 121 international scientific journals. He is the member of editorial board of 21 scientific journals. Feyzi Başar is also a member of scientific committee of 17 mathematics conference, has given talks at 14 different universities as an invited speaker and participated in more than 70 mathematics symposium with a paper.

• 1. Basic Functional Analysis. 2. Geometric Properties of Some Sequence Spaces. 3. Infinite Matrices. 4. Difference Sequence Spaces. 5. Almost Convergence and Classes of Related Matrix Transformations. 6. Spectrum of Some Triangle Matrices on Some Sequence Spaces. 7. Sets of Fuzzy Valued Sequences and Series.

Mohammad Mursaleen is presently a Principal Investigator for a SERB Core Research Grant at Department of Mathematics, Aligarh Muslim University. He has published more than 330 research papers in the field of Summability, Sequence Spaces, Approximation Theory, Fixed Point Theory, Measures of Noncompactness. He has also published 8 books and completed several National and International projects, visited several countries. Besides several master's students he has guided 20 Ph.D. students, and served as a reviewer for various international scientific journals. He is also a member of editorial boards of many international scientific journals.Feyzi Başar is a Professor Emeritus since July 2016, at ˙In¨on¨u University,Turkey. He has published an e-book for graduate students and researchers and more than 150 scientific papers in the field of summability theory, sequence spaces, FK-spaces, Schauder bases, dual spaces, matrix transformations, spectrum of certain linear operators represented by a triangle matrix over some sequence space, the alpha-, beta- and gamma-duals and some topological properties of the domains of some double and four dimensional triangles in the certain spaces of single and double sequences, sets of the sequences of fuzzy numbers, multiplicative calculus. He has guided 17 master and 10 Ph.D. students., served as a referee for 121 international scientific journals. He is the member of editorial board of 21 scientific journals. Feyzi Başar is also a member of scientific committee of 17 mathematics conference, has given talks at 14 different universities as an invited speaker and participated in more than 70 mathematics symposium with a paper.

• 1. Basic Functional Analysis. 2. Geometric Properties of Some Sequence Spaces. 3. Infinite Matrices. 4. Difference Sequence Spaces. 5. Almost Convergence and Classes of Related Matrix Transformations. 6. Spectrum of Some Triangle Matrices on Some Sequence Spaces. 7. Sets of Fuzzy Valued Sequences and Series.